具有碰撞整形脉冲对的无多普勒相干控制光谱
Doppler-free coherent-control spectroscopy with a colliding pair of shaped pulses
摘要：
我们利用超快空间相干控制方法研究了铷原子的精细结构双光子跃迁。利用我们的优化方案设计了光谱相位和振幅的反向传播超快光脉冲，成功地在不同的空间位置同时诱导了$5S_{1/2}$-$5P_{1/2}$ - $5D$和$5S_{1/2}$-$5P_{3/2}$ - $5D$的双光子跃迁.介绍了三种不同的脉冲整形解决方案，它们结合了振幅整形和相位编程，前者避免了直接的中间共振，后者使剩余的光谱分量能够通过目标过渡路径进行相干干涉。在室温蒸气室中进行了实验，实验结果与理论分析吻合较好。
英文摘要：
We demonstrate the use of the ultrafast spatial coherent-control method to resolve the fine-structure two-photon transitions of atomic rubidium. Counter-propagating ultrafast optical pulses with spectral phase and amplitude programmed with our optimized solutions successfully induced the two-photon transitions through $5S_{1/2}$-$5P_{1/2}$-$5D$ and $5S_{1/2}$-$5P_{3/2}$-$5D$ pathways, both simultaneously and at distinct spatial locations. Three different pulse-shaping solutions are introduced that combine amplitude shaping, which avoids direct intermediate resonances, and phase programming, which enables the remaining spectral components to be coherently interfered through the targeted transition pathways. Experiments were performed with a room-temperature vapor cell, and the results agree well with theoretical analysis.
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